Home Plumbing Pipe Fittings 251 Series Plastic Full Threaded/Mushroom Head Thru-Hull Connectors (1” Thread) Forespar 251 Series Plastic Full Threaded/Mushroom Head Thru-Hull Connectors (1” Thread) $58.89 251 Series Plastic Full Threaded/Mushroom Head Thru-Hull Connectors (1” Thread) quantity Add to cart